Alright, let's work through 5277 times 5439 step by step
5277 × 5439 = 5439 × (5277)
+ 5439 × 7 what gives us 38073
+ 5439 × 70 that is equal 380730
+ 5439 × 200 that results in 1087800
+ 5439 × 5000 that results in 27195000

= 28701603
